RHFL4913ESY3305V STMicroelectronics Integrated Circuit (Transistor Outline, Vertical) In Stock
The RHFL4913ESY3305V is a radiation-hardened fixed 3.3 V positive LDO voltage regulator in a TO-3 metal package, accepting 5.8 V to 12 V input, featuring 0.95 V typical dropout voltage, and guaranteed operation through heavy-ion and total-ionizing-dose radiation environments for space and defense applications.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- RHFL4913ESY3305V Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of RHFL4913ESY3305V?
- Radiation-hardened design tolerating total ionizing dose (TID) up to 300 krad(Si) and heavy-ion LET immunity for satellite and spacecraft power regulation
- Fixed 3.3 V output with ±0.01% load and line regulation ensuring stable digital logic supply under varying spacecraft power bus conditions
- Hermetic TO-3 metal package with 5.8 V to 12 V input range and 0.95 V dropout voltage for efficient regulation from unregulated satellite bus rails
What is RHFL4913ESY3305V used for?
The RHFL4913ESY3305V is designed for satellite on-board computer power supplies, space instrument electronics, and military avionics where ionizing radiation environments make commercial regulators unreliable. Its radiation-hardened silicon process maintains regulation performance through total ionizing doses encountered during multi-year low-Earth-orbit or geostationary satellite missions. The hermetic metal package provides outgassing-free operation compatible with vacuum and vibration environments found in launch vehicles and space platforms.
What are the specifications of RHFL4913ESY3305V?
| YTEOL | 6.01 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 0.95V |
| Input Voltage Absolute-Max | 14V |
| Input Voltage-Max | 12V |
| Input Voltage-Min | 5.8V |
| JESD-30 Code | R-CSFM-T3 |
| JESD-609 Code | e0 |
| Line Regulation-Max | 0.0132% |
| Load Regulation-Max | 0.0132% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -55 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 3.37V |
| Output Voltage1-Min | 3.23V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | CERAMIC, METAL-SEALED COFIRED |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Screening Level | MIL-PRF-38535 Class V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Total Dose | 300k Rad(Si) V |
| Voltage Tolerance-Max | 2% |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | France |
Where can I find the RHFL4913ESY3305V datasheet?
RHFL4913ESY3305V Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for RHFL4913ESY3305V?
Compatible alternatives and drop-in replacements for RHFL4913ESY3305V:
Frequently Asked Questions
What total ionizing dose can the RHFL4913ESY3305V withstand and how does this translate to satellite mission life?
The RHFL4913ESY3305V is characterized to withstand total ionizing doses up to 300 krad(Si) without parametric degradation beyond datasheet limits. In a low-Earth orbit at 550 km altitude, typical TID accumulation rates of 10 krad/year yield a guaranteed margin through a 30-year satellite lifetime, while in medium-Earth orbit with higher trapped proton flux at 5,000 km, the 300 krad budget supports over 10 years of continuous operation in mission-critical power regulation circuits.
What is the dropout voltage of the RHFL4913ESY3305V and how does it affect efficiency on a 5 V spacecraft bus?
The RHFL4913ESY3305V has a typical dropout voltage of 0.95 V, meaning the input must stay at or above 4.25 V to maintain a regulated 3.3 V output. From a 5 V spacecraft secondary bus, the power conversion efficiency is approximately 66%, with 0.95 W dissipated as heat per ampere of load current. In a thermally constrained spacecraft design, this heat must be conducted to a radiator panel, making thermal interface design a key factor in the power subsystem layout.
How does the RHFL4913ESY3305V's line and load regulation compare to commercial LDOs in precision analog instrument designs?
The RHFL4913ESY3305V specifies a maximum line and load regulation of 0.0132%, which is tighter than most commercial-grade LDOs rated at 0.1% to 0.5%. For a 12-bit ADC powered from the 3.3 V rail, a 0.0132% output voltage variation corresponds to less than 0.5 LSB of ADC reference drift, preserving measurement accuracy in space spectrometers and scientific payloads where supply noise directly contributes to instrument noise floor.
What heavy-ion immunity does the RHFL4913ESY3305V provide against single-event effects in the Van Allen radiation belts?
The RHFL4913ESY3305V is characterized for single-event latch-up (SEL) immunity at linear energy transfer (LET) values up to 60 MeV·cm²/mg, covering the heavy-ion environment encountered in geostationary and medium-Earth orbits where cosmic ray protons and heavy ions are abundant. SEL immunity prevents destructive latch-up currents that could damage the regulator or the spacecraft bus, eliminating the need for external current-limiting protection circuits in the power distribution unit.
Which package does the RHFL4913ESY3305V use and how is it mounted in a spacecraft power board?
The RHFL4913ESY3305V is housed in a hermetic TO-3 metal package with 3 leads, measuring approximately 26 mm × 40 mm. It mounts directly to the spacecraft chassis or a dedicated aluminum mounting plate using 2 screws through the package flange, providing a low thermal resistance path of approximately 2°C/W to the chassis wall. The metal case eliminates outgassing and moisture absorption that would compromise electrical isolation in a vacuum environment over multi-year missions.
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